Cream 1 cup butter together with the brown and white sugar until light and fluffy. Add vanilla and eggs...beat well. Add flour, cocoa, and baking soda. Stir in a half cup of the chopped pecans.

In a separate bowl, combine 1/2 cup chopped pecans with 1 tablespoon sugar. With floured hands, wrap 1 tablespoon of dough around a Rolo, covering completely. Press one side of dough/ball into pecan sugar mixture. Place, nuts side up, 2 inches apart on ungreased cookie sheets. Bake at 375 degrees for 7-10 minutes, or until set and slightly cracked. Cool two minutes...remove from pans.